In a world where gates open and monsters pour out, only a select few have the powerful powers of "Espers" and "Guides". Gyuhyeok, who has awakened as an S- class Esper, only has an E class regeneration ability. Lately, he's been worried. The S class Guide, "Sujeong," whom he considered family, attempted membrane guiding as soon as he became an adult! In the end, Sujeong tells Gyuhyeok that he wants to do XX guiding...